Coke oven door lifter machinery



Sept. 4 1958 SADAO SHIMAZAKI COKE OVEN DOOR LIFTER MACHINERY Filed Dec.17, 1952 2 Sheets-Sheet 1 In D M w M a w .M M w a 5 w 6&131 W In. A w223325 w 2 i M 2 4* 3 Q W- M O0 00 M a w 9 2 5 a hm 9 iii 1 F A w 1 H 51 2 a 7M 4E4 i a 9 a W E 0 .E 24..---- H Q y\ I F H a wmmk 9 315m 5 m 3i 3;??? 3 i 5 a a I Ti v P 2, 1,958 SADAQ sHIMAZA I r 2,850,173

coins OVEN DQOR LIFTER MACHINERY Filed Dec. 1'7, 1952 2 Sheets-Sheet 2Fig- 3- E; 51 v lZw III 48 Y A -roRNEyS United States Patent COKE OVENDOOR LIFTER MACHINERY Sadao Shimazaki, Toshima-ku, Tokyo, JapanApplication December 17, 1952, Serial No. 326,405

6 Claims. (Cl. 2124) This invention has relation to the manufacturing ofimproved coke oven door lifter machinery used to move coke oven doorsinto and out of their closed position.

This invention is adapted to press the coke oven door with the movingpressing portion by moving the door lifter, and to move the bar holdingit with the cooperating hook when the bar is released, and to turn themoving frame at right angle to a stationary position by moving themoving frame with the door cover.

When the coke oven door is going to be removed, the moving frame ismoved in front of the coke oven and the plunger is dropped, and thepressing frame is given a thrust by the pressure roller and theconnection between the locking bar and the cooperating hook is released.At the same time, the bill portion of the hook is engaged with theconnective bar and the door cover is raised a little and pulled towardsthe operator. Then the moving frame can be turned to a right angleposition by moving the piston rod.

My invention is illustrated in the accompanying drawings wherein: p t

Figure 1 is a front view of the door lifter;

'Figure 2 is a view partially in elevation and partially in verticalsection taken along the line I-III of Figure 1.

Figure 3 is an elevation looking at the opposite side of Figure 2.

Figure 4 is a transverse sectional view takenalong the line IV-IV ofFigure 1. v

Figure 5 is a partial horizontal section taken substantially on the lineVV of Figure l;

Figure 6 is a view in perspective of a yoke.

The coke oven door lifter mechanism of the present invention is designedto facilitate the removal of coke oven doors for whatever purpose may berequired; and this apparatus, as illustrated in the drawings, embodiesthe following structure. I j

The numeral 1 generally designates an 'eIongatevertically disposed framebody which is of channel cross sectional form and comprises the sideplates 1a and back 1b together with a head and base 1d. This structurehas mounted therein betweenthe side platesila and secured to the back 1ba vertical cylinder 2 having at its upper and lower ends means 2a and 2bfor connection therewith of suitable means for injecting operating fluidthereinto for the movement of. the piston P. This piston has connectedto it the rod 3 which extends downwardly through suitable packing meansin the. lower end of the cylinder.

Extending lengthwise of the inner sides of the side plates 1a and onopposite sides of the cylinder 2 are pitman bars 4 which are pivotallyconnected at. their lower ends with the lower or outer end of the pistonrod 3 as indicated at 6. r

Also pivotally connected at 6 to opposite sides of the pitman bars arethe short links 5 to be hereinafter more particularly described.

the 'tail portion 22a of the connector bar hook 20. The numeral 26generally'designates an upper forked lever of similar construction tothe lever 9. This upper" lever 26 embodies the spaced head portions 26band the 2,850,173 Patented Sept. 2, 19 58 2. of the pitman bars 4 upperand lower rollers 31 and 31' respectively, and these rollers movebetween vertical guide tracks 31a and 31b lying upon the inner sides ofthe frame side plate 1a.

Secured to the inner sides of the sides plates 1a of the frame adjacentto the lower end of the frame are the forwardly projecting bracketplates 7 which support the transverse shaft 10 and on the outer ends ofthis shaft 10 are rollers 10a.

The numeral 9 generally designates a forked lever which islongitudinally arcuate and embodies two spaced head portions 9a whichform a fork for-the purpose about to be described, and the downwardlycurving two-part tail piece 9b to which are attached or coupled by atransverse pivot pin 11, the outer ends of the links 5.

The shaft 10 passes through the apertures a at the inner ends of thehead portions 19a whereby the forked lever may rock thereon.

The numeral 13 generally designates a hook which carries or is formedwith an outer or forward bill 12 and a rear tail piece 13a. This hook 13is mounted for rocking movement on the shaft 10 and forwardly of theshaft, 10 it has connected therewith the outwardly or laterallyextending shaft ends 131; which pass through the transversely alignedbearing apertures b in the head portions 9a forwardly of the aperture,a. Y

Upon the outer sides of the forked lever the shaft ends 131) carry thecoke oven door frame pressing rollers 8.

The rearwardly and downwardly extending tail portion 13a of the forkedlever is pivotally coupled as at 15 to the lower end of a verticallyextending reach rod 14 whichv is attached to and carries upon its upperend a weight 16.-

The rollers 8 at the outer sides of the forked lever 9 have peripheralcontact with the rollers 10a carried on' the shaft 10 and the functionof these rollers 8 will be hereinafter set forth.

Secured to and extending upwardly from opposite sides of the weight 16are the longitudinally bowed bars 17 which are connected to oppositesides of 'an upper hook member which is generally designated 20, thestructure of which will be hereinafter described.

The inner sides of the side plates 1a of the frame have secured theretonear the top of the structure and directly hook 20 which, like the lowerhook 13, is adapted in the operation of the mechanism to be coupled withthe connector bar which forms a part of the coke oven door struc ture,not shown, which the lifter mechanism is designedto remove and replace.

The connector bar hook 20 is supported intermediate its ends on theshaft 19 and embodies the forwardly extending upturned bill 22 and therelatively long rearwardly and downwardly extending tail 22a which hasthe; curved back and forward edges 23 and 24 respectively,

with which adjacent parts of the mechanism engage in the operation ofthe mechanism.

The numeral 28 designates apair of connecting links corresponding to thelinks 5 and each of these links is pivotally connected'at one end to apitman bar 4 as indicated at 30, just below the upper roller 31. 28extend upwardly and outwardly on opposite sides-o downwardly andrearwardly curvinglowerend- 26a to the opposite sides of which the outerends of the links 28'are pivotally'coupled by the pi'votpin 29,.

The links On the inner side of the lower end 26a of the forked lever 26is a rearwardly projecting abutment 27 which is positioned for contactwith the edge 24 of the hook tail 22a during a part of the operation ofthe lifter mechanism and the upper rollers 31 are located for engagementwith the rear curved edge 23 of the tail 22a also during certain periodsof operation of the mechanism as hereinafter set forth.

The part of the hook 20 lying between the bill and the shaft 19 islocated between the head portions 26b and these head portions 26b arepivotally coupled by laterally extending portions of the shaft 25 withthe hook body forwardly of the shaft 19, as stated. Upon the outer sidesof the head portions of the forked lever 26 the shaft 25 carries cokeoven door pressing rollers 25a and these have peripheral contact withrollers 19a carried by the ends of the shaft 19.

The tail part 22a of the hook 20 lies between the upper ends of thecurved bars 17 and these bars are pivotally connected thereto as at 21.

On the outer side of one side plate or side wall 1a of the framestructure 1 is positioned the vertically disposed and verticallyslidable cam bar 32, an edge of which is formed, intermediate the endsof the bar, with the cam 32a. This cam bar at its upper end is locatedbetween and guided by the spaced guide strips 32b and at its lower endthe cam bar is connected by a bolt or pin 320 with the lower end portionof a pitman bar 4, the bolt passing through the side wall plate 1a byway of the vertical slot 32d.

Adjacent to the upper and lower ends of the frame structure are locatedthe forked levers 38 and 39 respectively which have the forwardlydirected forked ends 38a and 39a, which ends extend beyond the adjacentforward edges of the side wall or plate 1a of the frame.

The levers 38 and 39 are pivotally attached to the adjacent wall asindicated at 38b and 39b, so that they may swing in a vertical plane.

The forked levers 38 and 39 are connected by a reach rod 37, the ends ofwhich are pivotally attached to the levers 38 and 39 as indicated at 37aand 37b.

Approximately midway between the pivots 38b and 39b there is mounted onthe pivot pin 36 carried by the adjacent side wall plate 1a, a T-shapedlever which is generally designated 33, which comprises the two arms 33aand the intermediate leg 33b. The pivot 36 is located approximatelymidway between the ends of the arms 33a and the leg extends from the midportion of the lever between these arms and is pivotally attached as at370 to the reach rod 37 midway between the ends of the latter.

The arms 33a of the lever 33 extend in the direction of the length ofthe cam bar 32 and carry the upper and lower cam followers 34 and 35which have sliding contact or rolling contact with the adjacent cammededge of the bar 32. It will thus be seen that upon up and down movementof the bar 32 the cam portion 32a will alternately engage the followers34 and 35 so as to rock the T-shaped lever 33 and swing the leg 33b toimpart up and down motion to the reach rod 37 and correspond ing up anddown swinging movement to the forked levers 38 and 39.

The head 1c of the frame has fixed therein the upstanding post 51, thetop end of which is reduced and screw threaded as indicated at 51a.

Encircling the post 51 is a sleeve 44 which has formed integrally withits upper end the worm gear 45.

The sleeve 44 below the worm gear is screw threaded as indicated at 43and encircled by and has threaded connection in a collar frame 41 fromopposite sides of which project the stub shafts 42.

The numeral 40 designates portions of a body frame by which the liftermechanism is carried and another part of this body frame, lying belowthe lifter mechanism, is designated 52. The remaining portion of such 4body frame is not illustrated, for purpose of clarity, and since thebody frame itself forms no part of the invention, but it will beunderstood that such frame carries the mechanism and facilitates theplacing of the mechanism in position before or in front of the coke ovendoor, for use.

The stub shafts 42 are mounted in the parts 40 of the body frame so thatthe lifter mechanism may have rocking movement when necessary duringcertain periods of operation of the mechanism.

The reduced top end 51a. of the post 51 is encircled by a bearing 50which engages the upper side of the worm gear 45 and is held in place bythe cover cap 511) and the huts 51c threaded on the reduced portion ofthe post.

The frame 41 carries the spaced brackets 46 between which is rotatablymounted a worm 47 which meshes with the gear 45 and this worm is securedto or carried by the shaft 48 on which is mounted the pulley wheel 49which preferably is of the type adapted to receive a sprocket chain.Rotation of the worm 47 by means of a chain engaged around the wheel 49will impart turning movement to the sleeve 44.

The base portion 1d of the frame 1 is formed integral with and forms thetop of a casing 53 and this casing has extending vertically therethrougha shaft 53a, the lower end of which is mounted in and fixed to theportion of the body frame illustrated in section and designated 52.Thus, as previously stated, the lifter mechanism is held by the bodyframe between the parts thereof which are here shown and designated 40and 52.

Within the casing 52 the vertical shaft 53a has secured thereto thevertically spaced horizontally disposed arms 55. These arms are formedwith vertically aligned slots 54 and between the arms 55 are located thevertically spaced fixed plates 58 which are secured to the wall of thecasing at 58a.

The fixed plates 58 are also formed with slots 57 which are in verticalalignment.

The arms 55 are secured at one end to the shaft 53a and extend therefromacross the slots 57 of the fixed plates for the purpose about to bedescribed.

From one side of the casing 53 there extends the piston cylinder 59 inwhich is mounted the piston 60a connected to a rod 60 which passesthrough suitable packing into the casing and which is attached at theend lying within the casing to a cross head block 61 which carries pinsand sleeves 61a which fit into the slots 54 and 57 formed in the plates56 and 58.

At the opposite side of the casing 53 from the piston cylinder 59 thereextends the tubular sleeve 63 which protectively receives a stabilizingrod 60a forming an extension of the piston rod 60 on the side of thecross head remote from the piston rod.

It is believed that the operation of the mechanism will be readilyapparent from the foregoing description. However, a short description ofsuch operation will be given and in thisconnection reference is made tothe disclosure in applicants issued Patent No. 2,803,592, of August 20,1957, showing a coke oven door of a type with which the presentmechanism is designed for use.

In the patent referred to the coke oven door is illustrated as havingupper and lower connector bars or lift bars which in the present caseare indicated in Figs. 2 and 3 in dotted outline and designated 62.These connecting bars 62 are disposed horizontally adjacent to the upperand lower ends of the oven door. Also in the oven door structure in thepatent referred to there are illustrated upper and lower door clampingbars which extend across the face of the dor and are pivoted midwaybetween their ends to the door and are designed when rocked in onedirection to have clamping and locking engagement with side hookscarried by the door frame. Such clamping and locking bars are shown inbroken are designated 63.

outline in Fig. 1 of the drawings of this applicationand For the removalof the coke oven door by the present mechanism, the latter is moved bythe supporting body frame into the proper'position at the front. of thecoke oven door. The piston P in the cylinder 2 is actuated to the upperend of the cylinder so as to move the pitman bars upwardly to thepositions where the rollers 31 and 31' are shown in dotted outlineinFig. 2. This movement of the pitman bars will carry the attached ends ofthe links 5 and. 28 upwardly, rockingthe forked levers 9 and 26 on theshafts 10 and 19' respectively, and at the same time the abutmentportion 27 of the upper forked lever will be moved into contact with oragainst the forward edge 24' of the tail 22a of the upper hook 20 andthe upper hook will be swung down and corresponding movement will alsobe given to the hook 13, both by the pull applied to the forked lever bythe links 5 and by the upward pull applied to the reach rod 14 which isconnected with the rear end portion 13a of the lower hook 13. Thisupward movement of the pitman bars will also slide the cam bar 32upwardly by reason the pin connection 320 between the cam bar and theadjacent pitman bar, thus effecting the rocking of the T- shaped lever33 so as to raise or elevate the forked hooks 38 and 39.

The door connector bar engaging hooks 13 and 20 will then be in positionto have the bills extended to the underside of the door connector barsor door lift bars and the forked forward ends of the levers 38 and 39will be in the proper elevation for each to receive an end of a doorclamping bar 63.

By introducing pressure fluid into the cylinder 2 at the upper end,reverse movement of the piston may then be effected and as the pitmanbars move downwardly, thrust will be applied through the links 5 and 28to the forked levers moving the abutment 27 away from the forward edgeof the tail 22a of the upper hook and the weight 16 on the rod 14 willapply downward thrust to the rear end 13a of the hook 13, assisting inthe upward swinging of the bill end of the hook. The bills of the hookswill thus be elevated against the undersides of the door lift orconnector bars 62 and as the forked levers are swung during this liftingof the hooks, the pressure rollers 8 and 25 will bear against theadjacent sides of the door and apply pressure to the door and this willrelease slightly the engagement between the hooks and the bars 62.

' Continued downward movement of the piston will then raise the doorconnecting bars from approximately the position shown in dotted lines atA to the position shown at B. The door will therefore be first raisedslightly and then pushed in by the rollers 8 and 26 and as the hookscontinue to be moved upwardly, the door will be elevated a little moreand pulled slightly outward.

At the same time that the above described operation is taking place, thecam bar 32 will be moved downwardly and the cam will effect theoscillation of the lever 33 in an obvious manner so as to swing theforked levers 38 and 39 downwardly and since these levers are eachengaged with an end of a clamping bar when they are so swung downwardly,the clamping bars 63 will be turned to disengage the oven door from theholding hooks which form a part of the door frame.

After the door is freed from the frame, it can be moved outwardly easilywith the mechanism and by then actuating the piston 60a through theintroduction of fluid under pressure into the outer end of the cylinder59, turning movement may be imparted to the entire mechanism by means ofthe thrust imposed by the cross head against the slotted arms 55. Sincethe plates 58 are rigidly secured to the casing 53 while the slottedarms are fixed to the post 53a which is in turn fixed against rotationwith respect to the body frame 52, it will be seen that when the pistonis moved toward the inner end .of the cylinder the pin and sleeveconnection between the cross head and the slotted plates and arms willmove in the elongated slot 57 and simultaneously in the slots of thearms 55 and impose the desired thrust against the arms to force thecasing and the mechanism supported thereabove to rotate.

If the cover of the coke oven has become warped or otherwise distorted,movement can be imparted to the lifter mechanism by means of the chain,not shown, coupledwith the wheel 49. Such movement is given by turningthe wheel so as to efiect relative turning between the threaded sleeveand the frame 41 or, in other words, to give an up and down movement tothe mechanism to break the door loose.

" Having thus described my invention, what I claim as of said hooks,upper and lower levers pivotally mounted at one side of said frameadjacent to the upper and lower hooks and each having a bar-engagingfront end fork disposed at a side of the adjacent hook, upper and loweryokes straddling said hooks and pivotally mounted in position forengaging said levers, pitman bars slidable vertically in said frame,links connecting said pitman bars with said hooks, a cam bar slidablevertically externally of one side of said frame and connected with anadjacent pitman bar within the frame for vertical movement therewith, areach rod connecting the upper and lower levers, and a crank leverhaving pivotal connection at one end to said frame and having its otherend pivotally coupled to said reach rod to reciprocate the latter, saidcrank lever having a cross head at said one end for engagement by saidcam bar, the cam bar serving to rock the lever and move the reach rodlongitudinally and swing the forked levers in cooperating relation tothe movements of the books.

2. The structure of claim 1 wherein the pitman bars within the frame areslidable vertically along tracks carried by side walls of the frame andcarry rollers engaging the shank of one hook and tilting the connectedhooks during vertical movement of the pitman bars.

3. The structure of claim 1 wherein the pitman bars within the frame areprovided with members engaging and tilting one hook during verticalmovement of the pitman bars, a cylinder mounted vertically in saidframe, and a piston in said cylinder carried by a piston rod projectingfrom an end of said cylinder and connected with said pitman bars forsliding the pitman bars vertically during movements of the piston in thecylinder.

4. In an operating mechanism for a coke oven door, a vertically disposedmovable frame, mechanism in said frame including hooks projecting fromthe frame in position for engaging bars of a coke oven door andactuating members for swinging said hooks, forked bars carried by saidframe in cooperating relation to said hooks, a pivoted lever on theframe for moving the forked bars, the lever having side arms, a cam barfor tilting said lever by engagement with the arms thereof, said cam barbeing connected with the mechanism within the casing and moved therebyfor effecting operation of the forked bars in cooperating relation tosaid hooks, and driving means for the mechanism in the frame.

5. The structure of claim 4 wherein the moving frame is mounted forturning movement about a vertical axis, a head for the upper end of saidframe, a post extending upwardly from said head, a sleeve encircling thepost, a collar about said sleeve carrying bearings, a worm gear uponsaid sleeve, a worm rotatably supported in said bearings and meshingwith the worm gear and a threaded coupling between the sleeve andcollar.

6. The structure of claim 4 wherein the vertically movable frame isrotatable above a vertical axis, a casing at the lower end of saidframe, a stationary pivot shaft disposed vertically in said casing andprojecting downwardly therefrom, a horizontal plate fixed to andextending laterally from said pivot shaft within the casing and formedwith a slot extending radially of the pivot shaft, a stationaryhorizontal plate fixed in and to said casing formed with a slotextending across the slot in the plate carried by the pivot and havingdiagonally extending end portions, a cylinder carried horizontally bysaid casing, a piston in said cylinder carried by a piston ReferencesCited in the file of this patent UNITED STATES PATENTS 2,190,297Salkvist Feb. 13, 1940 2,335,866 Lavely Dec. 7, 1943 2,478,215 VanAckeren Aug. 9, 1949 2,491,831 Rackofi Dec. 20, 1949

